EP0676330A1 - Procédé de fabrication de sacs en plastique, refermables sur une machine à former, remplir et sceller - Google Patents

Procédé de fabrication de sacs en plastique, refermables sur une machine à former, remplir et sceller Download PDF

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Publication number
EP0676330A1
EP0676330A1 EP95400799A EP95400799A EP0676330A1 EP 0676330 A1 EP0676330 A1 EP 0676330A1 EP 95400799 A EP95400799 A EP 95400799A EP 95400799 A EP95400799 A EP 95400799A EP 0676330 A1 EP0676330 A1 EP 0676330A1
Authority
EP
European Patent Office
Prior art keywords
web
opening lip
thermoplastic film
tube
zipper strip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP95400799A
Other languages
German (de)
English (en)
Other versions
EP0676330B1 (fr
Inventor
Steven Ausnit
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Illinois Tool Works Inc
Original Assignee
Illinois Tool Works Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Illinois Tool Works Inc filed Critical Illinois Tool Works Inc
Publication of EP0676330A1 publication Critical patent/EP0676330A1/fr
Application granted granted Critical
Publication of EP0676330B1 publication Critical patent/EP0676330B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/18—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements
    • B65B61/188—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements by applying or incorporating profile-strips, e.g. for reclosable bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
    • B65B9/213—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles the web having intermittent motion

Definitions

  • the present invention relates to improvements in the manufacturing of reclosable plastic bags, and, more particularly, to a method which permits such bags to be formed as they are fed over a filling spout of a filling machine whereby the bags are formed and simultaneously filled with a product.
  • U.S. Patent No. 4,709,533 shows an apparatus and a method wherein film is fed downwardly wrapped around a form-fill tube and the edges of the film are brought together pressed between pressing rollers guiding the edges together so that an outer seal can be formed.
  • Means are provided for feeding interlocked zipper members between the film layers and between the rollers and the filling spout. Following the rollers, there are located uniquely positioned and shaped bars which include inner bars that have a space between them to guide the center portion of the zipper and these bars also form a backing for outer heated bars which seal the webs of the zipper to the inner surface of the bag film.
  • the outer bars also extend around the edges of the bag to simultaneously form an outer security seal or lip seal.
  • the thus formed and sealed zipper tube is filled through the spout and cross-seals with cross-cutters to complete the individual bags.
  • U.S. Patent No. 4,894,975 also shows an apparatus and method wherein film is fed downwardly wrapped around a form-fill tube and the edges of the film are brought together in adjacency.
  • the adjacent edges of the film are joined such as by heat sealing to interlocked zipper members, which thereafter form the sole juncture between the edges of the film and which zipper members provide a reclosable opening for the top of the completed bag.
  • a web extends between the zipper strips, either above or below the interlocking elements, which web can be constructed of a weight and width with optimum characteristics for forming a security seal at the top of the bag and forming a tamper-evident seal.
  • a bag is formed wherein the film of the bag has optimum characteristics for the bag, and the plastic of the zipper and of the web therebetween have optimum characteristics for the functions of the zipper and functions of the security tamper-evident seal.
  • the thus formed and sealed zipper tube is filled through the spout and cross-sealed with cross-cutters to complete the individual bags.
  • U.S. Patent No. 5,046,300 shows a method and apparatus for forming reclosable packages wherein a flat packaging film is formed over a forming shoulder and into a tubular shape about a central member.
  • the packaging film is advanced vertically downward along the length of the central member, and a reclosable profile element is threaded inside the tubular shape of the packaging film.
  • the tubular packaging film is deformed to form a longitudinally extending loop of packaging film, and the interlocked zipper members are guided into the loop.
  • the interlocked zipper members are then adhered to the inner surface of the loop of packaging film.
  • the thus formed and sealed zipper tube is filled through the spout and cross-sealed with cross-cutters to complete the individual bags.
  • the present invention represents an improved approach toward the attachment of a reclosable profile element to a tubular packaging film, and toward the formation of a reclosable plastic bag, with product contents therein which does not require the film to be away from the fill tube.
  • the present invention is a method for forming reclosable packages from a sheet of thermoplastic film on a form-fill-and-seal machine, wherein a continuous supply of zipper strip having first and second interlocking members is fed toward and longitudinally along a filling spout thereof.
  • thermoplastic film is also fed toward the filling spout, and is wrapped therearound enclosing the zipper strip within the tube so formed.
  • the lateral edges of the thermoplastic film are sealed together with a longitudinal seam to close the tube at a point away from the zipper location.
  • the webs of the zipper strip are then attached to the inside of the tube of thermoplastic film by sealing or welding them between the filling spout and sealing bars.
  • the webs of the zipper strip are attached to the tube film in the plane of the tube film. Thereafter, periodically along the length of the tube transverse seams are formed to produce individual reclosable packages, which are separated from one another.
  • Figure 1 is a simplified perspective view of a form-fill-and-seal machine on which reclosable packages may be made in accordance with the method of the present invention.
  • Figure 2 is a more detailed view of the sealing portion of the form-fill-and-seal machine shown in Figure 1.
  • Figure 3 is a partial cross-section taken as indicated by line 3-3 in Figure 1.
  • Figure 4 is a partial cross section taken as indicated by line 4-4 in Figure 1.
  • Figure 5 is a plan view of a reclosable package made in accordance with the present invention.
  • Figure 6 is a cross section of the reclosable package taken as indicated by line 6-6 in Figure 5.
  • Figure 7 is another partial cross section, analogous to that provided in Figure 3, for a further embodiment of the present invention.
  • Figure 8 is a partial cross section, analogous to that provided in Fig. 3, for another embodiment of the present invention.
  • Figure 9 is a partial cross section, analogous to that provided in Figure 3, for an alternate embodiment of the present invention.
  • Transverse seams 24 are formed by heat sealing bars 26, which seal the bottom of the tube 16, as well as the top of the bag 28 made immediately therebefore, and a predetermined amount of product (not shown) is dropped through the filling spout 10 into the tube.
  • the tube is then advanced a predetermined distance and the process is repeated.
  • the heat sealing bars 26 also separate each filled and sealed bag 28 from the bottom of the tube 16. The tube is then advanced a predetermined distance and the process is repeated.
  • a zipper strip 30 is fed from a supply roll (not shown) and past a guide roller 32 to abut directly against the outside of the filling spout 10 above the point where the film 14 is wrapped therearound.
  • the zipper strip 30 has a Y-type construction, as will be shown more clearly in subsequent figures, and is guided on the outside surface of the filling spout 10 by an anvil 34, which extends into the vertex of its Y-type construction.
  • the anvil 34 may be used to introduce a tear string 38 from a spool 40 into the space between the tube 16 and the zipper-strip 30. This feature will be shown more clearly in subsequent figures.
  • Beneath guide rollers 36 on the filling spout 10 are three heat sealing bars 42 which seal the zipper strip 30 to the tube 16 along seal lines 44,46,48, one seal line for each of the three arms of the Y-type construction of the zipper strip 30.
  • Two of the arms comprise the webs to which the profiles are attached and the third arm comprises an opening lip for the zipper.
  • the zipper strip 30 and tear string 38 may be formed of a thermoplastic material, such as polyethylene.
  • the film 14 may be polyethylene or a similar thermoplastic, and hence the zipper strip 30 and tear string 38 may be heat bonded thereto.
  • the tear strip may be formed of string or some other material encased in polyethylene.
  • Figure 2 is a more detailed view of a portion of the form-fill-and-seal machine shown in Figure 1.
  • Zipper strip 30 comprises a first interlocking profile member 50 and a second interlocking profile member 52.
  • First interlocking member 50 has a web 54 and a profile section 56.
  • Second interlocking member 52 has a web 58, a profile section 60, and an opening lip 62.
  • Web 54, web 58 and opening lip 62 are roughly oriented to describe the letter "Y". This is the reason for describing the zipper strip 30 as being of a Y-type construction.
  • Tube 16 of film 14 is between the zipper strip 30 and the guide rollers 36 and heat sealing bars 42.
  • Zipper strip 30, in turn, abuts against the outer surface of the filling spout 10 within the tube 16, and is ultimately within the bag 28.
  • the tear string 38 may be fed through the anvil 34, and out of the anvil, such as through hole 64 at a point above the guide rollers 36, below which it will be sealed to the inside of tube 16 by the middle of the three heat sealing bars 42.
  • the anvil 34 also maintains the separation between the web 54 and the opening lip 62, and ensures that web 54 and opening lip 62 are not sealed together when the middle of the three heat sealing bars 42 seals the tube 16 to the opening lip 62.
  • the two outer sealing bars 42 seal the tube 16 to webs 54,58.
  • Figure 3 is a partial cross section taken as indicated by line 3-3 in Figure 1 at a point in time before heat sealing bars 42 seal tube 16 to zipper strip 30.
  • the anvil 34 prevents the middle heat sealing bar 42 from sealing the opening lip 62 to web 54, but allows the tube 16 to be sealed to both the opening lip 62 and the tear string 38.
  • the two outer heat sealing bars 42 seal the tube 16 to web 54 and to web 58.
  • This figure also shows the position of the tear strip 38 with respect to the opening lip 62 by which a user gains access to the opening lip after the finished bag is severed along the tear strip.
  • Figure 4 is a partial cross section taken as indicated by line 4-4 in Figure 1 at a point in time after heat sealing bars 42 have sealed tube 16 to zipper strip 30.
  • Tube 16 is sealed to zipper strip 30 along seal lines 44,46,48.
  • Seal line 44 is the joint between tube 16 and web 54;
  • seal line 46 is the joint between tube 16 and opening lip 62 and includes tear string 38;
  • seal line 48 is the joint-between tube 16 and web 58.
  • FIG. 5 is a plan view of a bag 28 made in accordance with the present invention.
  • Bag 28 includes two transverse seams 24 made by heat sealing bars 26, and a longitudinal seam 20, which is on the back side thereof in the view given in Figure 5.
  • Seal line 44,46,48 go across the bag, and interlocked profile sections 56,60 are between seal lines 46 and 48.
  • Figure 6 is a cross section of the bag 28 taken as indicated by line 6-6 in Figure 5.
  • Longitudinal seam 20, formed by sealing the overlapped lateral edges 18 of film 14 together, is on the back side of bag 28.
  • Zipper strip 30 is inside the bag 28, and is sealed to the tube 16 along seal lines 44,46 and 48.
  • Tear string 38 is also sealed or welded to the inside of the tube 16 adjacent to opening lip 62.
  • FIGS 7, 8 and 9 are partial cross sections, analogous to that provided in Figure 3, for two alternate embodiments of the present invention.
  • anvil 34 in addition to preventing the sealing of web 54 to opening 62, is used to create a double loop 68 in the tube 16.
  • the loop 68 is located between web 54 and opening lip 62.
  • the tear string 38 may be disposed within loop 68 at a point adjacent to opening lip 62.
  • a second anvil 34a is provided to separate the profiles 56 and 58. This permits a jet of hot air to be introduced between the profiles via passage 34b to soften them prior to making the cross-seal as described in copending application SN 039,644.
  • anvil 34 has not been provided to ensure that opening lip 62 does not become sealed to web 54 the middle heat sealing bar 42. Rather, a non-seal layer 66, of a polymeric- material having a higher melting temperature than the other elements of zipper strip 30, is disposed on that portion of web 54 facing opening lip 62. Alternatively, the non-seal layer 66 may be disposed on that portion of the opening lip 62 facing web 54. Tear string 38, in this embodiment, is fed between tube 16 and non-seal layer 66 on web 54, and ultimately will be sealed or welded to tube 16.
EP95400799A 1994-04-11 1995-04-10 Procédé de fabrication de sacs en plastique, refermables sur une machine à former, remplir et sceller Expired - Lifetime EP0676330B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/226,288 US5412924A (en) 1994-04-11 1994-04-11 Method of making reclosable plastic bags on a form, fill and seal machine
US226288 1994-04-11

Publications (2)

Publication Number Publication Date
EP0676330A1 true EP0676330A1 (fr) 1995-10-11
EP0676330B1 EP0676330B1 (fr) 1997-09-03

Family

ID=22848313

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95400799A Expired - Lifetime EP0676330B1 (fr) 1994-04-11 1995-04-10 Procédé de fabrication de sacs en plastique, refermables sur une machine à former, remplir et sceller

Country Status (4)

Country Link
US (1) US5412924A (fr)
EP (1) EP0676330B1 (fr)
CA (1) CA2145941C (fr)
DE (1) DE69500636T2 (fr)

Cited By (3)

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Publication number Priority date Publication date Assignee Title
US6721999B2 (en) 2001-04-30 2004-04-20 Absolute Closure Innovations, Inc. Device for creating a seal between fabrics or other materials
US7451530B2 (en) 2001-04-30 2008-11-18 Gore Enterprise Holdings, Inc. Device for creating a seal between fabrics or other materials
US7574780B2 (en) 2004-10-25 2009-08-18 Gore Enterprise Holdings, Inc. Device for creating a seal between fabrics or other materials

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ES2364690T3 (es) * 1995-08-09 2011-09-12 James Worth Yeager Bolsa que se puede volver a cerrar.
AU7713496A (en) * 1995-11-30 1997-06-19 Minigrip Flexible Packaging Limited A method of forming a recloseable bag and/or a recloseable bag
FR2769288B1 (fr) 1997-10-03 1999-12-24 Flexico France Sarl Procede de fabrication automatique de sachets, machine a cet effet et sachets obtenus
FR2770487B1 (fr) * 1997-11-06 2000-02-04 Flexico France Sarl Machine de formation, remplissage et fermeture automatique de sacs, a profiles de fermeture transversaux
US6216423B1 (en) 1997-11-07 2001-04-17 Huntsman Kcl Corporation Method and apparatus for placing a product in a flexible recloseable container
FR2772004B1 (fr) * 1997-12-09 2000-02-25 Flexico France Sarl Machine de formation, remplissage et fermeture automatique de sacs, a profiles de fermeture transversaux
US5938337A (en) * 1998-10-13 1999-08-17 Tenneco Packaging Inc. Bottom filled, bottom-gusseted bag and method of making the same
US6327754B1 (en) 1999-05-10 2001-12-11 Pactiv Corporation Fastener with slider thereon for use in manufacturing recloseable bags
US6292986B1 (en) 1999-05-10 2001-09-25 Alexander R. Provan Assembly and accumulation of sliders for profiled zippers
US6286189B1 (en) 1999-05-10 2001-09-11 Pactiv Corporation Zipper and zipper arrangements and methods of manufacturing the same
US7101079B2 (en) 1999-05-11 2006-09-05 Sargento Foods, Inc. Resealable bag for filling with food product(s) and method
US6360513B1 (en) * 1999-05-11 2002-03-26 Sargento Foods Inc. Resealable bag for filling with food product(s) and method
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US6071011A (en) 1999-08-12 2000-06-06 Tenneco Packaging, Inc. Fill-through-the-top package
US6131370A (en) * 2000-02-09 2000-10-17 Illinois Tool Works Inc. Zipper applied across a film in transverse direction
US6494018B1 (en) 2000-08-09 2002-12-17 Pactiv Corporation Method and apparatus for guiding a fastener in a bag making machine
US6470551B1 (en) 2000-08-10 2002-10-29 Pactiv Corporation Method of making a fasteners arrangement with notches at spaced preseals
US6526726B1 (en) 2000-08-10 2003-03-04 Pactiv Corporation Method of applying a slider to a fastener-carrying plastic web
US6389780B1 (en) 2000-08-10 2002-05-21 Pactiv Corporation Zipper bag form, fill and seal machine and method
US6871473B1 (en) * 2000-08-10 2005-03-29 Pactiv Corporation Method and apparatus for making reclosable plastic bags using a pre-applied slider-operated fastener
US6508969B1 (en) 2000-08-10 2003-01-21 Pactiv Corporation Injection-molded end stop for a slider-operated fastener
CN1469830A (zh) * 2000-09-08 2004-01-21 ά����³��ҵ��˾ 可重复闭合的袋
US7476030B1 (en) * 2000-09-18 2009-01-13 Kabushiki Kaisha Hosokawa Yoko Fastener bag and fastener device
US6611996B2 (en) 2001-07-02 2003-09-02 Pactiv Corporation Slider for reclosable fastener
US6713152B2 (en) 2001-09-07 2004-03-30 Pactiv Corporation Fins and profiles for plastic bags
US6918234B2 (en) * 2002-02-21 2005-07-19 Pactiv Corporation Process for attaching slider-operated closure on form-fill-seal packaging machinery
US7159282B2 (en) 2002-03-01 2007-01-09 Pactiv Corporation Reclosable fasteners or zippers for use with polymeric bags
US7254930B2 (en) * 2002-03-18 2007-08-14 Frito-Lay North America, Inc. Stationary tucker bar mechanism
US6722106B2 (en) * 2002-03-18 2004-04-20 Recot, Inc. Vertical stand-up pouch
US6860084B2 (en) * 2002-03-18 2005-03-01 Frito-Lay North America, Inc. Vertical stand-up pouch with zipper seal quick change module
US7516596B2 (en) * 2002-03-18 2009-04-14 Frito-Lay North America, Inc. Bandolier format packaging
US7552574B2 (en) * 2002-03-18 2009-06-30 Frito-Lay North America, Inc. Variable tension gusseting system
US7299608B2 (en) * 2002-03-18 2007-11-27 Frito-Lay North America, Inc. Quick change module with adjustable former attachments
US6701695B1 (en) * 2002-04-18 2004-03-09 Brian Douglas Packaging machine for producing reclosable packages
US7341160B2 (en) * 2002-08-08 2008-03-11 Pactiv Corporation Reclosable package having an accessible zipper and a method for making the same
US6780146B2 (en) 2002-09-17 2004-08-24 Pactiv Corporation Methods for applying sliders to reclosable plastic bags
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US20040220034A1 (en) * 2003-04-30 2004-11-04 Melchoir Greg W. Method and apparatus for manufacturing a resealable package
US20070116388A1 (en) * 2003-08-04 2007-05-24 Raizo Kuge Fastener bag and fastening device
US20060083909A1 (en) * 2004-10-19 2006-04-20 Matthews David J Easy-open dough packages and related methods of manufacture
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US7410453B2 (en) * 2006-06-12 2008-08-12 Illinois Tool Works Inc. Method of sealing a zipper with concave bridges or bases using convex sealing bars
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US9102426B2 (en) * 2012-01-06 2015-08-11 Frito-Lay North America, Inc. Form-fill-seal machine including a filling tube with an elliptical cross-section
US8580067B2 (en) * 2012-02-23 2013-11-12 Chroma Paper, Llc. Thermo-sealing control method and packaging for resealable packaging
EP3386867B1 (fr) * 2015-12-08 2020-09-02 Illinois Tool Works Inc. Procédé pour former des emballages
US10981347B2 (en) * 2016-02-17 2021-04-20 Frito-Lay North America, Inc. Method and apparatus for resealable package with internal zipper seal
PL3622226T3 (pl) * 2017-05-10 2022-03-07 Gea Food Solutions Weert B.V. Ulepszone środki grzejne dla owijarki przepływowej
US10689137B2 (en) 2017-05-22 2020-06-23 Triangle Package Machinery Company Continuous vertical form, fill and seal machine and method for making reclosable packages
IT202100002633A1 (it) * 2021-02-05 2022-08-05 Ica Spa Sistema di chiusura per confezioni con elemento richiudibile ad incastro

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6721999B2 (en) 2001-04-30 2004-04-20 Absolute Closure Innovations, Inc. Device for creating a seal between fabrics or other materials
US7451530B2 (en) 2001-04-30 2008-11-18 Gore Enterprise Holdings, Inc. Device for creating a seal between fabrics or other materials
US7536758B2 (en) 2001-04-30 2009-05-26 Gore Enterprise Holdings, Inc. Device for creating a seal between fabrics or other materials
US7703184B2 (en) 2001-04-30 2010-04-27 Gore Enterprise Holdings, Inc. Device for creating a seal between fabrics or other materials
US7574780B2 (en) 2004-10-25 2009-08-18 Gore Enterprise Holdings, Inc. Device for creating a seal between fabrics or other materials

Also Published As

Publication number Publication date
CA2145941C (fr) 1999-12-07
DE69500636D1 (de) 1997-10-09
DE69500636T2 (de) 1998-04-02
CA2145941A1 (fr) 1995-10-12
EP0676330B1 (fr) 1997-09-03
US5412924A (en) 1995-05-09

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